Hawley b



June 26, 1923.

H. B. LEFLER iled SeptW I i v I e a I T] I I I Patented June 26, 19213 i ml l Application file. Septeniter 19255.

To all whom it may concern."

Be it known that Hawnmi' liericnn a citizen of the United States of America residing: at Grand Bayou, in the parish at Red R1 ver and State of Louisiana, has in vented new and useful Improvements in POllSll-EOfl Clamps, of which the following is a specification.

The object oi the invention is to provide a. simple and eilicient clamp for use in sup porting the polish rod of a well drilling' rig: during the application or removal oi pump rods and particularly to provide a device.

of this type whereby the accidental release of the pump rod with its attached string oi tools may be prevented to avoid the loss of time and the expense incident to such so currences in connection with well drilling operations; and with these objects in view the invention consists in a construction and combination of parts of which a preferred embodiment is shown in the accompanying drawings, wherein Figure l is a View of a pump rigging; ct conventional form equipped with a polish rod clamp constructed in accordance with the invention.

Figure is a detail view oi the clamp detachedh Figure 3 is a detail sectional view of the same.

Figure 4 is a detail sectional view at right angles to the plane of Figure 8.

The clamp 10 which as in the ordinary practice is adapted to be engaged with a follower rod 11 and to rest upon the casino; head 12 during the interchange, insertion. or removal of pump or drill rods in connection with well drilling}: pumping operations, consists of a horizontally ll-shaped body portion which may be a or forging having a slot H extended thereinto from one side edge and terminating in a rounded seat 15 for the reception of a polish, or drill rod and a follower block 16 fitted in said slot and provided at its inner end with a seat 1.7 which complements the seat 15 to embrace the polish or drill rod fitted therein. The arm portions 13 ot the body member 1.3 and the follower block are provided with registrable openings 18 and 1.9 tor the reception of a tapered or wedge pin 20 which when driven into place as indicated serves to advance the follower block toward the seat in the body member of the Serial No. Eiillfittiii.

clamp to compressively engage the rod in terposed between the inner end of said block and the seat in the body chamber. The Fo ce with which this compression or clamp action may he eitected is t course de-- pendent upon the amount to which the pin or wedge is driven into place and ay be varied according" to the veigi'ht of the rods and tools imposed. thereon to insure an ettective holding: oi? the rod during the opeations incident to inserting or removing a sec'ion.

in order that there may be an automatic clamping: action of the bloclr in the event of a tendency to downward movement of an eng 'aned pump rod or tube the opening 19 in a block is elongated to form a slot obliquely to the seat 17 at the inner face of the bloclr. Thus any downward tendency oil the block will cause it to move inwardly to increase the transverse pres sure on the engaged rod or tube lilavinp; described the invention, what is claimed as new and useful is it polish rod clamp having a transversely ll'shaped body member provided with a throat terminating in a seat tor the reception ot a d ill. rod Follower bloclr fitted in the throat ot said body member and movable toward and from the seat in the latter and a tapered or wednje pin transversely engaging registering openings in said body member and follower block for advancing; the latter toward. the said seat to clamp a rod interposed between the same and the seat.

1.. A polish rod clamp having; trans versely U shaped body member provided with a throat terminating in a seat tor the re option oi a drill rod, a follower block fitted in the throat of said body member and movable towin'gl and from. the seat in the latter. and a tapered or wedn'e pin transversely en; ren'isterin openin in said body member ed 'jollower block 'lor advancim the l ter toward the said seat to clamp a rod interposed between the same and the seat, the inner end oi the -Follower bloclr being; provided with a concaved seat to cornplement that in the body member.

A. polish rod clamp having; a tran versely ll-shaped body member provided with a throat terminating in a seat tor the reception oi the drill rod a 'tollower bloclr titted in the throat oi? the body .member and l. ll)

movable toward and from the seat thereof, said block being provided at its inner end with a, seat for cooperating with that in the throat of the body member, and a pin transversely engaging registering openings in said body member and follower block, the opening in one of said members being elongated to form a slot disposed in oblique relation to the seat at the inner face of the block to cause an inward movement of the latter coincidentally with the longitudinal movement thereof.

In testimony whereof he afi'lxes his signature.

HAVVLEY B. LEFLER. 

